Notes about the TEN file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries, unused processes and other unfavourable system settings to identify slowdown issues.
The TEN file type is primarily associated with 'TeeChart for .NET' by Steema Software. TeeChart for .NET does Windows Forms, ASP.NET Webforms and Compact Framework in one version.